I don't usually keep count, but, well, lessee... C (yeah, I know, yuck!, but only a short program), Perl (of course), Scheme, ML (a few lines of OCaml and SML/NJ, actually, but let's just count them as one), Common Lisp (also only a bit), Haskell, Curry, "English" (pseudocode! duh :), FORTH (a few varieties), MIXAL (to illustrate some concepts to a student). Yep, that's all :)
-- Kaufmann